129086913 has 16 divisors (see below), whose sum is σ = 174545280. Its totient is φ = 84850944.

The previous prime is 129086911. The next prime is 129086941. The reversal of 129086913 is 319680921.

It is not a de Polignac number, because 129086913 - 2¹ = 129086911 is a prime.

It is a super-2 number, since 2×129086913² = 33326862215739138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129086911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82345 + ... + 83897.

It is an arithmetic number, because the mean of its divisors is an integer number (10909080).

Almost surely, 2^129086913 is an apocalyptic number.

It is an amenable number.

129086913 is a deficient number, since it is larger than the sum of its proper divisors (45458367).

129086913 is a wasteful number, since it uses less digits than its factorization.

129086913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 129086913 is about 11361.6421788402. The cubic root of 129086913 is about 505.3908851571.

The spelling of 129086913 in words is "one hundred twenty-nine million, eighty-six thousand, nine hundred thirteen".